Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P5/00—Pumping cooling-air or liquid coolants
  • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
  • F01P5/04—Pump-driving arrangements
  • F01P5/043—Pump reversing arrangements
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P7/00—Controlling of coolant flow
  • F01P7/02—Controlling of coolant flow the coolant being cooling-air
  • F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
  • F01P7/044—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using hydraulic drives
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
  • F01P11/10—Guiding or ducting cooling-air, to, or from, liquid-to-air heat exchangers
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P3/00—Liquid cooling
  • F01P3/18—Arrangements or mounting of liquid-to-air heat-exchangers
  • F01P2003/185—Arrangements or mounting of liquid-to-air heat-exchangers arranged in parallel
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P2060/00—Cooling circuits using auxiliaries
  • F01P2060/02—Intercooler

Definitions

• US Pat. No. 5,944,603 discloses a sealing apparatus for a rotatable air inlet screen of an agricultural vehicle.
• the screen assembly 20 is positioned over the air inlet housing 22 and includes a rotatable member 24, screens 26 and 28, and cleaning assembly 30.
• the rotatable member 24 is unpowered and therefore does not push air into the air inlet housing or across the radiator 18.
• the radiator fan 18 induces airflow downward through screens 26, 28 and then the direction of airflow is changed in order for the airflow to pass through the radiator 16.
• the radiator fan 18 also induces rotation of rotatable member 24 and screen assembly 20 which results in a negative pressure difference.
• a design which uses an air mover to push air from the top of the vehicle, where the air is cleaner compared to the sides of the vehicle allows for the cleanest possible area for intake air. This also allows for a larger intake area and therefore a much lower intake airflow velocity.
• a pusher air mover preferably located between the screen area and the heat exchangers that allows cool airflow to be pushed into the cooling package across the heat exchangers arranged in a configuration to permit single pass of fresh airflow across each heat exchanger to increase efficiency and reduce plugging during normal operation.
• the air mover may also be reversible at optimal times to generate airflow in the reverse direction to remove debris such as accumulated soil and small plant materials surrounding the screen area during a cleaning operation.
• FIG. 2 is an exploded isometric view of an embodiment of the cooling system of the harvester of FIG. 1 ;
• FIG. 4 is an end view of a portion of the cooling system of FIG. 2;
• FIG. 5 is an enlarged end view of a portion of the cooling system of FIG. 2;
• FIG. 7 is a graph of the actual speed versus the desired speed when tuning the control system of the cooling system of the harvester.
• the present inventions may be used in any work vehicles such as, for example, harvester combines, windrowers or other types of agricultural, construction or forestry vehicles.
• An exemplary combine harvester 10 selected for illustration in FIG. 1 has a single rotary flow processing system 12 that extends generally parallel with the path of travel of the machine.
• the principles of the present invention are not limited to harvesters 10 with processing systems 12 designed for rotary flow, nor to axial flow harvesters having only a single such processing system.
• this specification will proceed utilizing a single rotary flow processing system 12 as the primary example.
• combine harvester 10 includes a harvesting header (not shown) at the front of the machine that delivers collected crop materials to the front end of a feeder house 14. Such materials are moved upwardly and rearwardly within feeder house 14 by a conveyer 16 until reaching a beater 18 that rotates about a transverse axis. Beater 18 feeds the material upwardly and rearwardly to a rotary processing device, in this instance to a rotor 22 having an infeed auger 20 on the front end thereof. Auger 20, in turn, advances the materials axially into the processing system 12 for threshing and separating. In other types of systems, conveyor 16 may deliver the crop directly to a threshing cylinder.
• a debris screen 70 may be used overtop of the air mover 60.
• a cleaning system may be used to remove debris collected on the screen.
• the cooling system 50 may also include a debris passage 130 for passing debris that enters the cooling box 80 from the exterior environment along with the airflow generated by the air mover 60.
• the debris passage 130 is preferably defined between at least a pair of opposing heat exchangers 102, 104, 106, 108.
• the debris passage 130 permits debris to pass from an upper portion of the cooling system 50, down between opposing heat exchangers, and to the exterior of the cooling system 50 though a debris outlet 134 defined between opposing ends of the heat exchangers 102, 104, 106, 108.
• the narrowest spacing between the lowermost or converging distal ends of opposing heat exchangers defines an elongated debris outlet 134 that substantially corresponds with the horizontal width of the heat exchangers 102, 104, 106, 108 and thus the cooling box 80 as best seen in FIG. 3.
• the system may preferably execute the following sequence (any time or range of time may be a preset and stored configurable value):
• Speed of the air mover 60 desirably is changed at a constant rate.
• the graph in FIG. 6 shows a typical reverse cycle.
• the PWM duty cycle is on the Y-axis and time on the X-axis. Higher PWM values results in slower air mover speed.
• control system uses air-mover speed for the control algorithm and air mover speed may not be measured, a relationship between air mover speed and value setting must exist. This is achieved by a tuning process.
• the control system has two fixed PWM values (70% and 0%) corresponding to minimum and maximum speed, respectively. The actual air mover speed is recorded for those values. Initial speed values for 0% and 70% were tried based upon manual air mover speed tests and the result revealed the air mover did not track to actual speed. Values of 2700 and 657 worked closer, but the values of 2650 and 657 appeared to provide the best approximation.
• FIG. 7 reveals the non-linearity in the PWM versus Speed settings. The 2650/657 actually works well because when more cooling capacity is required, the air mover is running slightly faster than the theoretical speed.
• Staged air movers reduce power consumption to those times when only necessary.
• the method includes turning on one or more of the air movers 60 A as the heat rejection load is required.
• the method may also include the step of comparing cooler output temperatures of the hydraulic oil cooler to oil reservoir temperatures and implement an air mover reversing operation to clear a supplemental cooling box screen 70A or clear the inner confines of the supple mental cooling box 80A from debris accumulation.
• the supplemental air mover 60A may be positioned at the left rear engine deck of the combine 10.
• Temperatures are measured for the hydraulic oil reservoir of the combine 10 and at the output of the supplementary cooler 80A. Staging of the air movers 60A is controlled by absolute cooler outlet temperatures. For example if three air movers 60A are installed for cooling in a linear setup, a three stage implementation may be used where stage one would be the center air mover, stage two would be the two outside air movers, and stage three would be all air movers operational. The stages would increase as the outlet temperature increase.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
• Component Parts Of Construction Machinery (AREA)
• Package Closures (AREA)

Priority Applications (3)

Applications Claiming Priority (16)

Publications (1)

Family

ID=46931970

Family Applications (1)

Country Status (4)

Cited By (3)

Families Citing this family (1)

Citations (9)

• 2012
  • 2012-04-02 BR BR112013025293-6A patent/BR112013025293B1/pt active IP Right Grant
  • 2012-04-02 WO PCT/US2012/031843 patent/WO2012135825A1/en unknown
  • 2012-04-02 AU AU2012236119A patent/AU2012236119B2/en not_active Ceased
  • 2012-04-02 EP EP12726510.6A patent/EP2694787B1/en active Active

Patent Citations (9)

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